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l. chackowsky, t. martins, m. rinne, c. couëslan and c ... · jv1 yg1 v3 v3 fnv3 fnv3 fnv3 jv1...

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  • L. Chackowsky, T. Martins, M. Rinne, C. Couëslan and C ... · jV1 yG1 V3 V3 fnV3 fnV3 fnV3 jV1 pG2.1 pG2.1 jBl jVm4 jV3.4 yD yS.1 fuDK2 fuDK2 pT.1 pR jV3.4 pG2.2 fuDK2 jT.1 ffV1
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DRAFT A new 1:250k scale unified legend for Precambrian rocks in Manitoba MGS MGS o l g o i e c g a l a s b u o r t i v n e a y m 1 9 8 2 Summary The Manitoba Geological Survey (MGS) identified the need for a revised 1:250k scale bedrock geology legend that is applicable to the entire province of Manitoba. Most MGS field mapping programs are carried out at scales of around 1:20k or 1:50k. In order to display this type of information at 1:250k scale, unit shapes must be simplified and assigned to regionally representative rock units. Using the previous 1:250k legend ( ) Figure 1 for this purpose presented several problems. For example, some unit names were not consistently applied throughout the province, and some names had connotations that were not appropriate for all regions in which they occur. The revised 1:250k bedrock geology legend (Figure 2) imposes a more logical and consistent simplification of regional bedrock geology that can be applied province-wide and updated at the end of each geoscientific field program or compilation project. Some compromise was necessary in producing the revised legend. For example, overly simplified unit names (such as “metasedimentary rocks”) were retained for regions lacking more detailed information or interpreted geophysically (such as in areas below Paleozoic cover). Some effects of applying the revised legend are illustrated in . Both maps show regional Figures 3 and 4 bedrock geology in the Flin Flon - Athapapuskow Lake region. The legend beside Figure 3 comprises units mapped in the Flin Flon domain, including subdivisions by assemblages and other information relevant at the original 1:62,500 scale (note that the legends in Figures 1 and 3 are not equivalent). The legend applied to the same map area in Figure 4 has been simplified according to the revised 1:250k common legend. Note that MGS adoption of the new 1:250k bedrock geology legend does not: 1) Delete previous information. A user interested in a particular area may choose to view the original polygon metadata to see previous descriptors or legend assignments, or view other compilations such as the map shown in Figure 3. 2) Modify more detailed geoscience data. For example, units mapped at 1:20k or 1:50k scale are not restricted to the common 1:250k legend. 3) Remove the option to highlight local features. For example, ultramafic units too small to display at 1:250k scale will continue to be marked with point features wherever relevant. Figure 3: Bedrock geology of the Flin Flon - Athapapuskow Lake region (resized from original map at 1:62,500 scale; for comparison with Figure 4) ! ! ! !!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! !!!!!!!!! ! ! !!!!!! ! ! ! !!!!!! !! ! ! ! ! ! ! ! !! ! !!! !!!!!! ! !!!!!!! ! !!!!!!!!!!!! ! ! ! ! ! !! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!!! !!!!!!!!!!!!!!!!!!!!!!!! !! !!! ! !!!!! !!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!! ! !!!!! ! !!! ! ! ! ! !!! ! ! !!! ! ! !!!! !!! ! ! !! !!!! !! !!!! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! !! !! !!! !! ! !! ! ! ! ! ! !! ! ! !! ! ! ! ! ! ! !!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! e e e e e e e e ! ³ A ! 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Map Sheet: FF-ATHA Flin Flon Domain Flin Flon area, Map 2010-1 (Simard et al., 2012) PROTEROZOIC Successor-arc and younger rocks Post-Missi Group Intrusive Rocks Granodiorite, diorite, gabbro, monzodiorite, tonalite Weherlite, serpennized ultramafic rocks, pyroxenite, hornblendite Weherlite, serpennized ultramafic rocks, pyroxenite, hornblendite Biote-augite meladiorite; porphyric gabbro, melagabbro Quartz-feldspar porphyry, massive to banded; granodiorite, quartz diorite Missi Group Sandstone Pebbly sandstone Pebble to cobble conglomerate, with minor interbedded sandstone and pebbly sandstone Pre-Missi Group intrusive rocks Granite, granodiorite and quartz diorite Flon Flon arc assemblage (>1.88 Ga) Synvolcanic Intrusive Rocks Quartz-phyric tonalite to leucotonalite, minor quartz diorite Gabbronorite Undivided Intrusive Rocks Felsic dikes and sills/intrusions, and possible flows, aphyric to sparsely quartz-plagioclase-phyric Mafic dikes and sills/intrusions, aphyric to plagioclase-phyric Cope Lake Volcanic Rocks Basalt flows, aphyric to plagioclase- and pyroxene-phyric; mafic volcaniclasc rocks Eastern Hook Lake Succession Rhyolite flows and flow breccia, quartz-phyric to aphyric Basalt flows, aphyric to sparsely plagioclase- and pyroxene- phyric; mafic and heterolithic volcaniclasc rocks Western Hook Lake Succession Mafic and heterolithic volcaniclasc rocks Rhyolite flows and flow breccia Basalt flows, aphyric to plagioclase- and pyroxene-phyric Douglas Formaon Mafic and heterolithic volcaniclasc rocks; aphyric to plagioclase-phyric pillowed basalt flows. Lewis Formaon Massive and pillowed basalt flows, plagioclase (>10%)- and pyroxene (>5%)-phyric; minor volcaniclasc rocks Hidden Formaon Heterolithic mafic volcaniclasc breccia; well-bedded tuff Massive and pillowed basalt flows, aphyric to plagioclase- phyric, and associated breccia; mafic to felsic volcaniclasc rocks Fe-Ti-P massive and pillowed basalt flows, amygdaloidal aphyric to sparsely plagioclase-phyric Flin Flon Formaon Rhyolite flows, massive, locally flow-banded, mostly quartz- and plagioclase-phyric; felsic volcaniclasc rocks Massive and pillowed aphyric to plagioclase-phyric basalt flows; mafic to felsic volcaniclasc rocks; minor rhyolite flows Mafic volcanicalasc rocks, mostly lapilli tuff and tuff breccia, plagioclase-crystal-rich; basalt flows and associated flow breccia Massive to bedded heterolithic lapilli tuff to tuff breccia, with localized heterolithic felsic breccia, and bedded mafic tuff; minor basalt flows Hamell Lake Volcanic Rocks Plagioclase-phyric basalt flows; aphanic to quartz- and plagioclase-phyric rhyolite flows; associated volcaniclasc rocks Unassigned Volcanic Rocks Mafic volcaniclasc rocks, heterolithoc volcaniclasc rocks, basalt flows, felsic and heterolithic volcaniclasc rocks Athapapuskow Lake area, Map GR2014-1-1 (Syme, 2015) PALEOPROTEROZOIC Tectonite Shear-zone rocks: mafic and felsic tectonite Northeast Arm shear zone Tectonite and mylonite with mafic and felsic intrusive rocks Mylonite pyroxenite and gabbro/quartz diorite 1.86 to 1.84 ga middle successor-arc volcanogenic sedimenatry and intrusive rocks; Missi Group siliciclasc rocks Post-Missi Group Intrusive Rocks Sparsely plagioclase-phyric trachyandesite sills Missi Group (1842-1847 Ma) Sandstone, tuffaceous sandstone, minor mudstone, siltstone Pebble conglomerate, polymicc pebble-cobble conglomerate, pebbly sandstone Pre-Missi Group intrusive rocks and intrusive rocks of unknown age Neso Lake pluton Pyroxenite, melagabbro, gabbro Pyroxenite, melagabbro, gabbro Diorite, gabbro, related intrusion breccia Biote-hornblende quartz diorite, related intrusion breccia Tonalite, quartz diorite Dikes, sills and minor intrusions Quartz diorite, gabbro Pyroxenite Pyroxenite Diabase Mafic plagioclase porphyry dikes Intrusion breccia with fine-grained mafic matrix; associated with leucotonalite-rhyolite Aphyric and porphyric rhyolite dikes; fine-grained leucotonalite Epiclasc and volcanogenic sedimentary rocks Conglomerate, pebbly wacke, greywacke 1.88 to 1.86 ga early successor-arc volcanic, sedimentary and intrusive rocks Mafic sills Quartz diorite, tonalite, magneferous ferrodiorite, feldspathic diorite Epiclasc, volcaniclasc and volcanic rocks Andesic and felsic greywacke; siliceous siltstone, mudstone; minor mafic pillowed flows Early juvenile-arc and ocean-floor (ca. 1.90 to 1.88 ga) rocks Intrusive rocks of arc affinity (1.90-1.88 Ga ) Plutons Pegmate, aplite Medium-grained, equigranular tonalite; quartz megacrysc tonalite Leucocrac tonalite intrusion breccia Gabbro Quartz diorite intrusion breccia; quartz diorite Minor intrusions Minor intrusions: gabbro, diorite, quartz diorite, tonalite, related breccias Intrusion breccia with quartz diorite to tonalite matrix, in part pegmac Quartz diorite, tonalite Gabbro, diorite: fine- to medium-grained, equigranular Volcanic rocks of arc affinity (1.90-1.88 Ga); associated volcaniclasc and sedimentary rocks Undivided volcanic and volcaniclasc rocks Heterolithic breccia Felsic and intermediate volcaniclasc rocks and associated sedimentary rocks Mafic volcaniclasc rocks: plagioclase crystal-lapilli tuff, pyroclasc breccia, pillow-fragment breccia Rhyolite flows Basalt, basalc andesite, andesite, associated pillow breccias Intrusive rocks of ocean-floor affinity (ca. 1.90 Ga ) Mafic and ultramafic sills and dikes Gabbro, diorite, fine- to medium-grained, equigranular; minor diorite and quartz diorite Diabase, fine- to medium-grained Peridote Mafic-ultramafic layered intrusions Gabbro, ultramafic rocks Gabbro, leucogabbro, gabbroic anorthosite, anorthosite Pyroxenite, peridote Volcanic rocks of ocean-floor affinity (ca. 1.90 Ga); associated volcaniclasc and sedimentary rocks Greywacke, mudstone, mafic tuff Mafic volcaniclasc rocks Undivided mafic flows Basalt, mostly aphyric Aphyric and plagioclase±pyroxene-phyric/glomeroporphyric basalt Pillowed basalt Athapapuskow basalt: massive flows, minor pillowed flows 1.90 to 1.88 ga contaminated arc rocks and rocks of unknown affinity (Mysc Lake assemblage) Felsic plutonic rocks: granite, quartz-megacrysc tonalite Felsic hypabyssal rocks: rhyolite; leucotonalite; aphyric and plagioclase-phyric diabase; aplite; pegmate Mafic volcaniclasc rocks: plagioclase-phyric crystal tuff, lapilli tuff, breccia Tectonically laminated mafic rocks derived from amygdaloidal basalt, diabase and mafic tuff. Neoarchean to Paleoproterozoic granitoid rocks containing ca. 2.5 ga zircons Granite NATMAP Shield Margin Project area, Map A-98-2 PROTEROZOIC Sedimentary, volcanic and hypabyssal intrusive rocks (1.87 to 1.83 Ga) Missi Metamorphic Suite Sandstone, siltstone, mudstone and derived quartzofeldspathic gneiss and migmate Polymicc conglomerate, sandstone, conglomerate gneiss, local psammic gneiss, undifferenated conglomerate and derived gneiss Rocks of Uncertain Age Mafic tectonite, phyllonite, mylonite, mafic phyllonite ± carbonate, cataclasite Greywacke, siltstone, mudstone, tuff; derived biote gneiss ± garnet ± sillimanite, quartzofeldspathic gneiss Intrusive rocks (1.88 to 1.83 Ga) Felsic tectonite, mylonite; felsic phyllonite, quartz-sericite ± carbonate schist Dykes and dyke complexes: aphyric and porphyric felsic- intermediate dykes; quartz- to feldspar- porphyry Granite Granite to granodiorite Syenite to monzonite Leucogranodiorite to tonalite Granodiorite to tonailte Granodiorite Granodiorite to tonailte Granodiorite to tonailte: xenolith-rich phase Foliated and gneissic granodiorite to tonailte Tonalite Leucotonalite Tonalite to quartz diorite Monzodiorite to quartz monzonite Quartz monzonite Monzodiorite to quartz monzodiorite Composionally layered gabbro, gabbronorite, ferrogabbro, quartz ferrodiorite, ferrotonalite, leucotonalite, melagabbro; heterogeneous mulphase gabbro, diorite Gabbro, diorite, quart diorite and derived amhibolite Gabbro, diorite Diorite Diorite to quartz diorite Diabase, diabase dyke complex Xenolith-rich gabbro to quartz diorite Amphibolite Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga) Juvenile Arc Rocks Undivided juvenile arc rocks Mafic to felsic hypabyssal intrusions Tonalite, quartz diorite Gabbro, diorite, porphyric diorite, diabase Composionally layered gabbro sills and intrusions Volcaniclasc rocks, calc-silicate rocks Shoshonic tuff, resedimented Felsic volcaniclasc rocks: tuff, lapilli tuff, breccia, heterolithologic breccia, dacite tuff Intermediate volcaniclasc rocks: tuff, lapilli tuff, breccia, intermediate to felsic volcaniclasc rocks and flows, derived gneiss Mafic volcaniclasc rocks: resedimented mafic tuff, lapilli tuff, breccia; mafic wacke; pillow fragment breccia; heterolithologic breccia, dominantly mafic fragments; undivided mafic volcaniclasc rocks and flows Rhyolite to dacite (flows, flow breccia) Arc-ri basalt (pillowed and massive flows): ferrobasalt, rhyolite crystal tuff; synvolcanic dykes and sills; gabbro, ferrogabbro, quartz ferrodiorite sills Basalt, basalc andesite (pillowed and massive flows): tholeiic basalt, basalc andesite, gabbro, derived amphibolite, calc-alkaline basalt, basalc andesite, boninite, layered to uniform amphibolite Evolved Arc Rocks Mysc Lake Assemblage Tonalite, granodiorite, diorite, intrusive sheets (rhyolite, quartz diorite, diabase), gabbro to diorite Ocean Floor Rocks Undivided ocean-floor rocks: mafic volcanic and related intrusive rocks, amphibolite, mafic tectonite Gabbro, diabase sills and dykes Evolved basalts: massive and pillowed basalt, diabase; gabbro, derived amphibolite MORB/back arc basin basalts: pillowed and massive basalt, diabase; derived tectonite, breccia; plagioclase megaphyric and aphyric basalt, gabbro; derived amphibolite Rocks of Unknown Genesis Mafic to felsic volcanic, volcaniclasc and hypabyssal intrusive rocks, derived mafic gneiss Clearwater Domain PROTEROZOIC Sedimentary, volcanic and hypabyssal intrusive rocks (1.87 to 1.83 Ga) Rocks of Uncertain Age Supracrustal migmac hornblende gneiss and interlayered hornblende-biote gneiss Intrusive rocks (1.88 to 1.83 Ga) Granite to granodiorite Granodiorite Tonalite to quartz diorite Gabbro, diorite, quart diorite and derived amhibolite Ultramafic rocks: pyroxenite, melagabbro, peridote, serpennite Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga) Ocean Floor Rocks Undivided ocean-floor rocks: mafic volcanic and related intrusive rocks, amphibolite, mafic tectonite Rocks of Unknown Genesis Mafic to felsic volcanic, volcaniclasc and hypabyssal intrusive rocks, derived mafic gneiss pB.8 pB.9 ajX ajT yG2 jV3.1 ajTl yU jV3.2 ajB.1 jT.1 yD ajD.1 jB yR ajBh jBl yS.1 ajTh jV4 yS.2 ajD.2 jVs4 yC ajB.2 jVf4 jVi4 yG1 ajV jVm4 ajV4.1 fsT jV1 ajV4.2 fsB jV3.3 ajV4.3 jV3.4 ajV1 fuDK4 ajV3.1 fuDK2 eT fcV3 aoB.1 oV3.1 aoB.2 Vp1 oB aoU.1 Vh3 oV3.3 aoB.3 oV3.4 V4 aoB.4 V1 uV3 V3 aoW fdV4 aoV4 wN1 aoV3 flVx3 aoVm3 pG1 fnV4 aoVp3 pG2.1 fnV3 aoVo3 pT fnVi3 aoAV3 pB ffV1 pU acGq1 ffV3 acGh1 ffVp4 fV3.1 acV4 ffV4 uV3 acV3 fmVp3 anG1 fuV3 atP mS.1 atPi mC wP wW asV2 asS pP asC pR pG1.1 pG1.2 asU.1 pG1.3 asD.1 pGl2.1 asD.2 pG2 asT pG2.1 pG2.2 asD.4 pG2.3 asU.2 pG2.4 asB.1 pT.1 asR pT.3 asTh pT.4 asV1 pZ3 pZ3.1 asC pZ3.2 pBl asD.5 pB asW pB.1 pB.3 pB.5 pB.6 Flin Flon--Athapapuskow 0 5 10 15 20 25 km km Legend Figure 4: Bedrock geology of the Flin Flon - Athapapuskow Lake region using revised 1:250k legend assignments (resized as in Figure 3) pBL pB pW pV3 pB pV pV1 pS pW pCP pT pV1 pGl pV3 pV3O pD pV3 pV1 pV3V pD pV3 pV3O pV3V pV3V pV1 pB pV3V pV3O pZ1 pV3O pB pV3V pB pV3V pV1 pZ1 pV3V pD pC pG pC pV3 pV3P pB pV3O pD pV pV3P pV3O pBL pV3V pD pB pB pR pG pB pT pV1P pV1 pV3V pV1V pZ3M pB pV3 pV1 pD pV3O pT pT pV3O pB pV3O pG pV1 pB pR pV3P pT pB pV3V pV3P pV1V pV3P pV2V pV1 pB pS pV1 pR pR pV pB pV3 pB pB pV3 pS pG pB pV3V pB pB pD pB pB pV3O pV3 pR pB pV3V pV3V pB pV3V pG pV3P pV3 pB pU pB pB pG pB pG pB pG pT pB pV3V pB pV3P pT pU pV pB pV3P pG pB pV3O pV3 pT pV1 pV3V pB pG pD pB pV3 pG pB pB pT pV1 pV3O pV2V pD pT pV3O pV3 pB pB pB pT pT pT pG pV1P pB pV pV3 pV3O pD pV3 pV1 pV3 pD pB pB pV1V pT pV3V pV3 pV3V pV1P pV1P pB pM pV3 pT pV3 pR pB pX pB pM pV1 pV3O pDt pD pG pV pV3 pV1P pU pX pT pT pV1 pV3O pG pB pM pV1 pB pD pDt pCP pW pV3 pV3V pB pV3V pT pZ2 pW pV1P pBL pCP pV3 pV3O pDt pV3P pM pW pV3 pV1 pB pV1P pV3 pU pW pV3P pW pB pV3V pD pV3P pT pW pT pT pZ3 pB pS pV3O pV3O pT pB pV3O pT pV3P pV3V pB pV3 pV3O pV3O pB pB pB pG pB pB pB pV3 pDt pW pA pU pZ3 pB pV3V pB pB pG pB pV3V pV2 pV3V pB pT pN1 pB pV3O pB pV3 pV3 pV3 pU pB pZ3M pV3 pB pG pG pB pB pB pB pB pB pG pV3 pV3O pT pB pV3P pV3V pV3P pV3V pM pG pV3O pV3P pV3V pV3O pD pV3V pV3O pT pB pR pV1 pS pT pB pT pV3V pG pT pZ1 pD pV3O pV1 pD pDt pV3O pV3 pV3 pV1P pB pB pCP pG pG pGN pCP pZ2 pV3 pGH pS pT pB pT pZ3M pG pM pG pG pB pG pT pB pV3O pV3O pT pS pBL pG pD pV1 pV3O pT pG pG pV3 pV3 pV3O pM pM pG pV3O pV3 pG pN1 pN1 pN1 pG pG pG pV3O pV3O pB pG pV3 Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Goose Lake Swordfish Lake Arthurs Lake Nesosap Lake Nesosap Lake Cliff Lake Bakers Lake Leo Lake Lile Rat Lake Timber Wolf Lake Thompson Lake Sucker Lake Whitefish Lake Bear Lake Bryan Lake Murray Lake Tapukok Lake Pothook Lake Sleep Lake Kinghorn Lake Milliken Lake White Lake Niyanun Lake Lucile Lake Persian Lake Nao Lake Nisto Lake Ledge Lake B. C. Lake Neso Lake Blackjack Lake Twin Lake Fox Lake Kelly Lake Dodds Lake Anvil Lake Payuk Lake Oer Lake Bond Lake Lynx Lake Newman Lake Naosap Lake Tartan Lake Aim?e, Lac Embury Lake Alberts Lake Alberts Lake Mikanagan Lake Big Island Lake Schist Lake Schist Lake First Cranberry Lake 102° 102° Flin Flon--Athapapuskow 0 5 10 15 20 25 km km Legend pS pW pC pCP pV pV1 pV1P pV1V pV2 pV2V pV3 pV3O pV3P pV3V pX pG pGl pGH pGN pZ2 pZ3 pZ3M pZ1 pR pT pD pDt pB pBL pU pA pM pN1 Sedimentary Rocks Quartzo-feldspathic sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate polymicc Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate Granite to granodiorite leucocrac xenolith-bearing gneissic Syenite Monzodiorite to quartz monzodiorite monzodiorite to quartz monzonite Monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite Diorite, quartz diorite diorite to tonalite Gabbro, diabase, diorite, norite composionally layered Ultramafic rocks Metamorphic Rocks Amphibolite Mylonite, tectonite, cataclasite Felsic gneiss Proterozoic pA Amphibolite g) garnet amphibolite h) amphibolite, diopside- &/or hornblende- bearing O) amphibolite with locally preserved pillow structures pB Gabbro, diabase, diroite, norite L) composionally layered gabbro pC Metaconglomerate h) hornblende bearing polymicc metaconglomerate N) gneissic metaconglomerate pD Diorite, quartz diorite m) magnete quartz diorite N) gneissic quartz diorite to granodiorite t) diorite to tonalite x) pyroxene diorite pE Enderbite x) gneissic ferrohypersthene enderbite pF Iron formaon o) oxide facies iron formaon s) silicate facies iron formaon pG1 Granite b) biote granite to granic gneiss f) granite, fluorite bearing g) garneferous granite to granodiorite H) hybrid granite h) hornblende granite, aplite l) leucocrac granite m) magnete granite, petmate N) gneissic granite to granodiorite, granic gneiss P) porphyric and megacrysc granite, leucogranite R) seriate to prophyric granite X) pegamc granite pG2 Granodiorite, granite, tonalite b) biote granodiorite H) hybrid granodiorite to granite gneiss h) hornblende granodiorite l) leucocrac granodiorite N) gneissic granodiorite to tonalite P) porphyric and megacrysc granodiorite to tonalite v) muscovite bearing granodiorite - granite pI Anorthosic gabbro, anorthosite pK Calc-silicate rock, marble, dolomic marble x) albite-pyroxene rock ± marble pM Mylonite, mylonic granitoid gneiss pN1 Felsic gneiss, migmate H) hybrid gneiss h) hornblende-bearing quartzofeldspathic gneiss m) magnete-bearing felsic orthogneiss N) semipelic paragneiss to metatexite with tonalite pN2 Intermediate gneiss pP Phyllonite, mylonite, tectonite, cataclasite, schist m) mudstone, subordinate arenite pQ Quartzite pR Quartz- to feldspar-porphyry pS Arenites: sandstone, siltstone, arkose, quartzofeldspathic paragneiss b) biote gneiss, meta-arkose h) hornblende bearing quartzofeldspathic gneiss m) magneferous quartzofeldspathic gneiss M) quartzofeldspathic migmate and migmac gneiss N) arkosic gneiss q) quartz arenite pT Tonalite to quartz diorite, granodiorite A) augen tonalite b) biote tonalite f) tonalite to granodiorite, fluorite-bearing H) hybrid tonalite, tonalic gneiss h) hornblende tonalite l) leucotonalite, leucocrac gneissic tonalite m) magnete tonalite to granodiorite N) gneissic to foliated tonalite to granodiorite g) gneissic garneferous tonalite-granodiorite P) megacrysc biote tonalite to granodiorite ±garnet x) clinopyroxene tonalite pU Ultramafic rocks pV Undifferenated volcanic rocks pV1 Rhyolite, dacite, pyroclasc rocks pV2 Intermediate volcanic rocks P) porphyric and aphyric basalt and andesite pV3 Pillowed to massive mafic volcanic rocks k) basalt and komaic basalt O) pillow basalt P) porphyric basalt pV4 Volcanicalsc rocks f) felsic volcaniclasc rocks i) intermediate volcaniclasc rocks m) mafic volcaniclasc rocks pW Greywacke and derived gneiss, migmate b) biote bearing greywacke and gneiss f) potassium feldspar bearing greywacke and gneiss g) garneferous gneiss, metagreywacke h) hornblende bearing greywacke-derived gneiss m) magnete bearing greywacke-derived migmate q) quartzofeldspathic greywacke, biote paragneiss t) staurolite metagreywacke, schist V) volcaniclasc greywacke pX Pegmate, pegmac granite pZ1 Monzonite, monzogranite h) hornblende bearing monzonite to quartz monzonite P) megacrysc monzonite to monzogranite pZ2 Syenogranite, syenite pZ3 Monzodiorite to quartz monzonite Proterozoic and/or Archean uA Amphibolite uB Gabbroic and mafic dykes (Molson Swarm) uC Conglomerate, volcanic derived (probably Archean) uG1 Granite, leucogranite N) foliated granite, leucogranite uG2 Granodioric gneiss to diatexite N) foliated granodioric gneiss uN Felsic to tonalic gneiss A) augen gneiss b) biote ± hornblende gneiss L) layered migmate gneiss, migmate uS Metasedimentary rocks uT Tonalite, tonalic gneiss uU Ultramafic rocks, largely serpennized peridote uV3 Mafic to ultramafic metavolcanic rocks Archean aA Amphobolite, layered amphibolite d) garnet-diopside amphibolite f) amphibolite to gabbro, plagioclase porphyric g) amphibolite, garnet bearing, locally layered L) layered amphibolite, metagabbro, gneiss x) pyroxene amphibolite aB Gabbro, layered metagabbro, diabase dykes a) anorthosic gabbro f) plagioclase-phyric gabbro (agmate) h) hornblende gabbro P) porphyric gabbro, diabase x) pyroxene-phyric gabbro aC Metaconglomerate, polymicc conglomerate V) volcanic conglomerate X) conglomerate with pegmac granite and pegmate aD Diorite, quartz diorite, tonalite h) diorite, quartz diorite, biote+hornblende- bearing q) quartz diorite aE Enderbite, enderbic gneiss N) enderbic gneiss g) enderbic gneiss, garnet bearing S) schollen enderbite aG1 Granite, leucocrac granite, quartz monzonite A) augen granite b) biote granite to granodiorite h) hornblende-biote granite H) xenolith bearing granite, granodiorite k) microcline granite l) leucogranite N) gneissic granite to granodiorite gneiss P) porphyric and porphyroblasc granite X) pegmac granite, pegmate aG2 Granodiorite, tonalite, quartz diorite A) augen granodiorite; felsic augen gneiss b) biote granodiorite H) hybrid granodiorite to granic gneiss h) hornblende-bearing granodiorite l) leucogranodiorite N) gneissic granodiorite to gneissic tonalite, locally migmac P) porphyric, porphyroblasc, and megacrysc granodiorite x) pyroxene granodiorite, gabbro X) pegmate aH Chloritoid schist aI Anorthosite, anorthosic gabbro aM Migmate: mixture of granodiorite gneiss to tonalite gneiss, granite, tonalite aN1 Granic and granodioric gneiss, migmate D) laminated felsic gneiss g) garneferous quartzofeldspathic gneiss X) felsic gneiss with abundant pegmate and aplite aN2 Intermediate layered to migmac gneiss M) migmac paragneiss h) hornblende gneiss m) mesocrac to melanocrac layered gneiss aN3 Mafic gneiss, in part migmac N) migmate, hornblende and hornblende- biote gneiss aO1 Felsic to intermediate granulite, opdalite, enderbic gneiss P) porphyric opdalite aO2 Mafic granulite aP Metamorphosed shale and silty shale p) pyriferous siltstone and shale aQ Quartzite aR Felsic porphyry f) plagioclase porphyry q) quartz porphyry aS Arenites: quartz-plagioclase paragneiss, sandstone, biote gneiss, arkose q) quartz arenite, minor mudstone, conglomerate x) biote gneiss with pyroxene aT Tonalite to granodiorite, with tonalic to granodioric gneiss A) augen tonalite b) biote tonalite g) tonalic granofels H) hybrid tonalite, tonalic gneiss h) hornblende tonalite L) tonalite to tonalic gneiss, layered l) leucotonalite N) geneissic tonalite to tonalic gneiss P) porphyric tonalite x) hypersthene tonalite Y) mylonic tonalite aU Ultramafic rocks k) komaite, komaic basalt s) ultramafic to mafic rocks, sapphirine bearing aV1 Felsic volcanic rocks F) volcanic fragmental rocks, related sediments P) porphyric rhyolite Y) mylonic volcanic rocks aV2 Intermediate volcanic rocks aV3 Mafic volcanic Rocks F) mafic volcanic fragmental rocks, related sediments O) pillowed basalt P) mafic plagioclase-phyric flows aV4 Volcaniclasc rocks and related sedimentary rocks f) felsic volcaniclasc rocks i) intermediate volcaniclasc rocks aW Metagreywacke N) amphibolite-biote-garnet gneiss T) tuffacious greywacke aX Pegmate, aplite aZ1 Quartz monzonite x) hypersthene granite (monzocharnockite) H) hypersthene granite and hybrid granite, gneiss aZ2 Syenite aZ3 Monzodiorite x) monzodiorite, pyroxene-bearing Figure 1: Previous 1:250k scale bedrock geology legend pS pSb pSh pSm pSq pW pC pCM pCP pF pFo pFs pK pKx pP pV pV1 pV1P pV1V pV2 pV2V pV3 pV3b pV3O pV3P pV3V pX pXg pXm pG pGb pGf pGg pGh pGl pGo pGH pGN pGP pGX pZ2 pZ2q pZ3 pZ3x pZ3M pZ1 pZ1h pR pT pTf pTl pTo pTH pD pDg pDm pDt pDx pB pBK pBL pBM pBP pI pU pY pA pAL pM pN1 pN2 pN3 uC uW uV uV1 uV2 uV2O uV3 uG uGl uGN uT uB uU uY uA uN aS aSb aSh aSm aSq aW aC aCM aCP aF aFo aFs aK aP aV aV1 aV1P aV1V aV2 aV2V aV3 aV3b aV3k aV3O aV3P aV3V aX aXg aXm aG aGb aGf aGg aGh aGl aGo aGH aGN aGP aGX aZ2 aZ2q aZ3 aZ3x aZ3M aZ1 aZ1h aR aT aTf aTl aTo aTH aTN aD aDg aDm aDt aDx aB aBL aBP aI aU aY aA aAL aM aN1 aN2 aN3 Proterozoic Sedimentary Rocks Quartzo-feldspathic sandstone biote-bearing hornblende-bearing magnete-bearing quartz sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate monomicc polymicc Iron formaon oxide facies silicate facies Calc-silicate rock, marble, dolomic marble albite-pyroxene rock +/- marble Mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks basalt and komaic basalt pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate granic mafic Granite to granodiorite biote-bearing fluorite-bearing garnet-bearing hornblende-bearing leucocrac orthopyroxene-bearing (charnockite to opdalite) xenolith-bearing gneissic seriate or porphyric pegmac Syenite quartz syenite Monzodiorite to quartz monzodiorite pyroxene-bearing monzodiorite monzodiorite to quartz monzonite Monzonite hornblende monzonite to quartz monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite fluorite-bearing leucocrac orthopyroxene-bearing tonalite (enderbite) xenolith-bearing Diorite, quartz diorite (quartz) diorite to granodiorite magnete-bearing diorite to tonalite pyroxene-bearing Gabbro, diabase, diorite, norite mafic dikes (MacKenzie) composionally layered mafic to ultramafic dikes (dominantly Molson) porphyric Anorthosic gabbro, anorthosite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite layered amphibolite Mylonite, tectonite, cataclaste Felsic gneiss Intermediate gneiss Mafic gneiss Proterozoic / Archean Sedimentary Rocks Conglomerate Argillaceous sandstone to mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks Andesite, interlayered tuff, minor basalt pillowed andesite Mafic to ultramafic volcanic rocks Intrusive Rocks Granite to granodiorite leucocrac gneissic Granodiorite to tonalite Gabbro, diabase, diroite, norite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite Felsic gneiss Archean Sedimentary Rocks Quartzo-feldspathic sandstone biote-bearing hornblende-bearing magnete-bearing quartz sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate monomicc polymicc Iron formaon oxide facies silicate facies Calc-silicate rock, marble, dolomic marble Mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks basalt and komaic basalt komaite and komaic basalt pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate granic mafic Granite to granodiorite biote-bearing fluorite-bearing garnet-bearing hornblende-bearing leucocrac orthopyroxene-bearing granodiorite xenolith-bearing gneissic seriate or porphyric pegmac Syenite quartz syenite Monzodiorite to quartz monzodiorite pyroxene-bearing monzodiorite monzodiorite to quartz monzonite Monzonite hornblende-bearing monzonite to quartz monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite fluorite-bearing leucocrac orthopyroxene-bearing tonalite (enderbite) xenolith-bearing gneissic Diorite, quartz diorite (quartz) diorite to granodiorite magnete-bearing diorite to tonalite pyroxene-bearing Gabbro, diabase, diorite, norite composionally layered porphyric Anorthosic gabbro, anorthosite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite layered amphibolite Mylonite, tectonite, cataclasite Felsic gneiss Intermediate gneiss Mafic gneiss Figure 2: Revised 1:250k scale bedrock geology legend (draft) L. Chackowsky, T. Martins, M. Rinne, C. Couëslan and C. Böhm Manitoba Geological Survey

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Page 1: L. Chackowsky, T. Martins, M. Rinne, C. Couëslan and C ... · jV1 yG1 V3 V3 fnV3 fnV3 fnV3 jV1 pG2.1 pG2.1 jBl jVm4 jV3.4 yD yS.1 fuDK2 fuDK2 pT.1 pR jV3.4 pG2.2 fuDK2 jT.1 ffV1

DRAFT

A new 1:250k scale unified legend for Precambrian rocks in ManitobaMGSMGS

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19 82

Summary

The Manitoba Geological Survey (MGS) identified the need for a revised 1:250k scale bedrock geology legend that is applicable to the entire province of Manitoba.

Most MGS field mapping programs are carried out at scales of around 1:20k or 1:50k. In order to display this type of information at 1:250k scale, unit shapes must be simplified and assigned to regionally representative rock units. Using the previous 1:250k legend ( ) Figure 1for this purpose presented several problems. For example, some unit names were not consistently applied throughout the province, and some names had connotations that were not appropriate for all regions in which they occur.

The revised 1:250k bedrock geology legend (Figure 2) imposes a more logical and consistent simplification of regional bedrock geology that can be applied province-wide and updated at the end of each geoscientific field program or compilation project. Some compromise was necessary in producing the revised legend. For example, overly simplified unit names (such as “metasedimentary rocks”) were retained for regions lacking more detailed information or interpreted geophysically (such as in areas below Paleozoic cover).

Some effects of applying the revised legend are illustrated in . Both maps show regional Figures 3 and 4bedrock geology in the Flin Flon - Athapapuskow Lake region. The legend beside Figure 3 comprises units mapped in the Flin Flon domain, including subdivisions by assemblages and other information relevant at the original 1:62,500 scale (note that the legends in Figures 1 and 3 are not equivalent). The legend applied to the same map area in Figure 4 has been simplified according to the revised 1:250k common legend.

Note that MGS adoption of the new 1:250k bedrock geology legend does not:

1) Delete previous information. A user interested in a particular area may choose to view the original polygon metadata to see previous descriptors or legend assignments, or view other compilations such as the map shown in Figure 3.

2) Modify more detailed geoscience data. For example, units mapped at 1:20k or 1:50k scale are not restricted to the common 1:250k legend.

3) Remove the option to highlight local features. For example, ultramafic units too small to display at 1:250k scale will continue to be marked with point features wherever relevant.

Figure 3: Bedrock geology of the Flin Flon - Athapapuskow Lake region (resized from original map at 1:62,500 scale; for comparison with Figure 4)

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Map Sheet: FF-ATHA

Flin Flon DomainFlin Flon area, Map 2010-1 (Simard et al., 2012)PROTEROZOICSuccessor-arc and younger rocks

Post-Missi Group Intrusive Rocks

Granodiorite, diorite, gabbro, monzodiorite, tonalite

Weherlite, serpen�nized ultramafic rocks, pyroxenite,hornblendite

Weherlite, serpen�nized ultramafic rocks, pyroxenite,hornblendite

Bio�te-augite meladiorite; porphyri�c gabbro, melagabbro

Quartz-feldspar porphyry, massive to banded; granodiorite,quartz diorite

Missi Group

Sandstone

Pebbly sandstone

Pebble to cobble conglomerate, with minor interbeddedsandstone and pebbly sandstone

Pre-Missi Group intrusive rocks

Granite, granodiorite and quartz diorite

Flon Flon arc assemblage (>1.88 Ga)Synvolcanic Intrusive Rocks

Quartz-phyric tonalite to leucotonalite, minor quartz diorite

Gabbronorite

Undivided Intrusive Rocks

Felsic dikes and sills/intrusions, and possible flows, aphyric tosparsely quartz-plagioclase-phyric

Mafic dikes and sills/intrusions, aphyric to plagioclase-phyric

Cope Lake Volcanic Rocks

Basalt flows, aphyric to plagioclase- and pyroxene-phyric;mafic volcaniclas�c rocks

Eastern Hook Lake Succession

Rhyolite flows and flow breccia, quartz-phyric to aphyric

Basalt flows, aphyric to sparsely plagioclase- and pyroxene-phyric; mafic and heterolithic volcaniclas�c rocks

Western Hook Lake Succession

Mafic and heterolithic volcaniclas�c rocks

Rhyolite flows and flow breccia

Basalt flows, aphyric to plagioclase- and pyroxene-phyric

Douglas Forma�on

Mafic and heterolithic volcaniclas�c rocks; aphyric toplagioclase-phyric pillowed basalt flows.

Lewis Forma�on

Massive and pillowed basalt flows, plagioclase (>10%)- andpyroxene (>5%)-phyric; minor volcaniclas�c rocks

Hidden Forma�on

Heterolithic mafic volcaniclas�c breccia; well-bedded tuff

Massive and pillowed basalt flows, aphyric to plagioclase-phyric, and associated breccia; mafic to felsic volcaniclas�crocks

Fe-Ti-P massive and pillowed basalt flows, amygdaloidalaphyric to sparsely plagioclase-phyric

Flin Flon Forma�on

Rhyolite flows, massive, locally flow-banded, mostly quartz-and plagioclase-phyric; felsic volcaniclas�c rocks

Massive and pillowed aphyric to plagioclase-phyric basaltflows; mafic to felsic volcaniclas�c rocks; minor rhyolite flows

Mafic volcanicalas�c rocks, mostly lapilli tuff and tuff breccia,plagioclase-crystal-rich; basalt flows and associated flowbreccia

Massive to bedded heterolithic lapilli tuff to tuff breccia, withlocalized heterolithic felsic breccia, and bedded mafic tuff;minor basalt flows

Hamell Lake Volcanic Rocks

Plagioclase-phyric basalt flows; aphani�c to quartz- andplagioclase-phyric rhyolite flows; associated volcaniclas�crocks

Unassigned Volcanic Rocks

Mafic volcaniclas�c rocks, heterolithoc volcaniclas�c rocks,basalt flows, felsic and heterolithic volcaniclas�c rocks

Athapapuskow Lake area, Map GR2014-1-1 (Syme, 2015)PALEOPROTEROZOIC

Tectonite

Shear-zone rocks: mafic and felsic tectonite

Northeast Arm shear zone

Tectonite and mylonite with mafic and felsic intrusive rocks

Mylonite pyroxenite and gabbro/quartz diorite

1.86 to 1.84 ga middle successor-arc volcanogenic sedimenatryand intrusive rocks; Missi Group siliciclas�c rocks

Post-Missi Group Intrusive Rocks

Sparsely plagioclase-phyric trachyandesite sills

Missi Group (1842-1847 Ma)

Sandstone, tuffaceous sandstone, minor mudstone, siltstone

Pebble conglomerate, polymic�c pebble-cobbleconglomerate, pebbly sandstone

Pre-Missi Group intrusive rocks and intrusive rocks of unknownage

Neso Lake pluton

Pyroxenite, melagabbro, gabbro

Pyroxenite, melagabbro, gabbro

Diorite, gabbro, related intrusion breccia

Bio�te-hornblende quartz diorite, related intrusion breccia

Tonalite, quartz diorite

Dikes, sills and minor intrusions

Quartz diorite, gabbro

Pyroxenite

Pyroxenite

Diabase

Mafic plagioclase porphyry dikes

Intrusion breccia with fine-grained mafic matrix; associatedwith leucotonalite-rhyolite

Aphyric and porphyri�c rhyolite dikes; fine-grainedleucotonalite

Epiclas�c and volcanogenic sedimentary rocks

Conglomerate, pebbly wacke, greywacke

1.88 to 1.86 ga early successor-arc volcanic, sedimentary andintrusive rocks

Mafic sills

Quartz diorite, tonalite, magne�ferous ferrodiorite, feldspathicdiorite

Epiclas�c, volcaniclas�c and volcanic rocks

Andesi�c and felsic greywacke; siliceous siltstone, mudstone;minor mafic pillowed flows

Early juvenile-arc and ocean-floor (ca. 1.90 to 1.88 ga) rocksIntrusive rocks of arc affinity (1.90-1.88 Ga )

Plutons

Pegma�te, aplite

Medium-grained, equigranular tonalite; quartz megacrys�ctonalite

Leucocra�c tonalite intrusion breccia

Gabbro

Quartz diorite intrusion breccia; quartz diorite

Minor intrusions

Minor intrusions: gabbro, diorite, quartz diorite, tonalite,related breccias

Intrusion breccia with quartz diorite to tonalite matrix, in partpegma��c

Quartz diorite, tonalite

Gabbro, diorite: fine- to medium-grained, equigranular

Volcanic rocks of arc affinity (1.90-1.88 Ga); associatedvolcaniclas�c and sedimentary rocks

Undivided volcanic and volcaniclas�c rocks

Heterolithic breccia

Felsic and intermediate volcaniclas�c rocks and associatedsedimentary rocks

Mafic volcaniclas�c rocks: plagioclase crystal-lapilli tuff,pyroclas�c breccia, pillow-fragment breccia

Rhyolite flows

Basalt, basal�c andesite, andesite, associated pillow breccias

Intrusive rocks of ocean-floor affinity (ca. 1.90 Ga )Mafic and ultramafic sills and dikes

Gabbro, diorite, fine- to medium-grained, equigranular; minordiorite and quartz diorite

Diabase, fine- to medium-grained

Perido�te

Mafic-ultramafic layered intrusions

Gabbro, ultramafic rocks

Gabbro, leucogabbro, gabbroic anorthosite, anorthosite

Pyroxenite, perido�te

Volcanic rocks of ocean-floor affinity (ca. 1.90 Ga); associatedvolcaniclas�c and sedimentary rocks

Greywacke, mudstone, mafic tuff

Mafic volcaniclas�c rocks

Undivided mafic flows

Basalt, mostly aphyric

Aphyric and plagioclase±pyroxene-phyric/glomeroporphyri�cbasalt

Pillowed basalt

Athapapuskow basalt: massive flows, minor pillowed flows

1.90 to 1.88 ga contaminated arc rocks and rocks of unknownaffinity (Mys�c Lake assemblage)

Felsic plutonic rocks: granite, quartz-megacrys�c tonalite

Felsic hypabyssal rocks: rhyolite; leucotonalite; aphyric andplagioclase-phyric diabase; aplite; pegma�te

Mafic volcaniclas�c rocks: plagioclase-phyric crystal tuff, lapillituff, breccia

Tectonically laminated mafic rocks derived from amygdaloidalbasalt, diabase and mafic tuff.

Neoarchean to Paleoproterozoic granitoid rocks containing ca. 2.5ga zircons

Granite

NATMAP Shield Margin Project area, Map A-98-2PROTEROZOICSedimentary, volcanic and hypabyssal intrusive rocks (1.87 to1.83 Ga)

Missi Metamorphic Suite

Sandstone, siltstone, mudstone and derivedquartzofeldspathic gneiss and migma�te

Polymic�c conglomerate, sandstone, conglomerate gneiss,local psammi�c gneiss, undifferen�ated conglomerate andderived gneiss

Rocks of Uncertain Age

Mafic tectonite, phyllonite, mylonite, mafic phyllonite ±carbonate, cataclasite

Greywacke, siltstone, mudstone, tuff; derived bio�te gneiss ±garnet ± sillimanite, quartzofeldspathic gneiss

Intrusive rocks (1.88 to 1.83 Ga)

Felsic tectonite, mylonite; felsic phyllonite, quartz-sericite ±carbonate schist

Dykes and dyke complexes: aphyric and porphyri�c felsic-intermediate dykes; quartz- to feldspar- porphyry

Granite

Granite to granodiorite

Syenite to monzonite

Leucogranodiorite to tonalite

Granodiorite to tonailte

Granodiorite

Granodiorite to tonailte

Granodiorite to tonailte: xenolith-rich phase

Foliated and gneissic granodiorite to tonailte

Tonalite

Leucotonalite

Tonalite to quartz diorite

Monzodiorite to quartz monzonite

Quartz monzonite

Monzodiorite to quartz monzodiorite

Composi�onally layered gabbro, gabbronorite, ferrogabbro,quartz ferrodiorite, ferrotonalite, leucotonalite, melagabbro;heterogeneous mul�phase gabbro, diorite

Gabbro, diorite, quart diorite and derived amhibolite

Gabbro, diorite

Diorite

Diorite to quartz diorite

Diabase, diabase dyke complex

Xenolith-rich gabbro to quartz diorite

Amphibolite

Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga)Juvenile Arc Rocks

Undivided juvenile arc rocks

Mafic to felsic hypabyssal intrusions

Tonalite, quartz diorite

Gabbro, diorite, porphyri�c diorite, diabase

Composi�onally layered gabbro sills and intrusions

Volcaniclas�c rocks, calc-silicate rocks

Shoshoni�c tuff, resedimented

Felsic volcaniclas�c rocks: tuff, lapilli tuff, breccia,heterolithologic breccia, dacite tuff

Intermediate volcaniclas�c rocks: tuff, lapilli tuff, breccia,intermediate to felsic volcaniclas�c rocks and flows, derivedgneiss

Mafic volcaniclas�c rocks: resedimented mafic tuff, lapilli tuff,breccia; mafic wacke; pillow fragment breccia; heterolithologicbreccia, dominantly mafic fragments; undivided maficvolcaniclas�c rocks and flows

Rhyolite to dacite (flows, flow breccia)

Arc-ri� basalt (pillowed and massive flows): ferrobasalt,rhyolite crystal tuff; synvolcanic dykes and sills; gabbro,ferrogabbro, quartz ferrodiorite sills

Basalt, basal�c andesite (pillowed and massive flows):tholeii�c basalt, basal�c andesite, gabbro, derivedamphibolite, calc-alkaline basalt, basal�c andesite, boninite,layered to uniform amphibolite

Evolved Arc RocksMys�c Lake Assemblage

Tonalite, granodiorite, diorite, intrusive sheets (rhyolite, quartzdiorite, diabase), gabbro to diorite

Ocean Floor Rocks

Undivided ocean-floor rocks: mafic volcanic and relatedintrusive rocks, amphibolite, mafic tectonite

Gabbro, diabase sills and dykes

Evolved basalts: massive and pillowed basalt, diabase;gabbro, derived amphibolite

MORB/back arc basin basalts: pillowed and massive basalt,diabase; derived tectonite, breccia; plagioclase megaphyricand aphyric basalt, gabbro; derived amphibolite

Rocks of Unknown Genesis

Mafic to felsic volcanic, volcaniclas�c and hypabyssal intrusiverocks, derived mafic gneiss

Clearwater DomainPROTEROZOICSedimentary, volcanic and hypabyssal intrusive rocks (1.87 to1.83 Ga)

Rocks of Uncertain Age

Supracrustal migma��c hornblende gneiss and interlayeredhornblende-bio�te gneiss

Intrusive rocks (1.88 to 1.83 Ga)

Granite to granodiorite

Granodiorite

Tonalite to quartz diorite

Gabbro, diorite, quart diorite and derived amhibolite

Ultramafic rocks: pyroxenite, melagabbro, perido�te,serpen�nite

Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga)Ocean Floor Rocks

Undivided ocean-floor rocks: mafic volcanic and relatedintrusive rocks, amphibolite, mafic tectonite

Rocks of Unknown Genesis

Mafic to felsic volcanic, volcaniclas�c and hypabyssal intrusiverocks, derived mafic gneiss

pB.8

pB.9ajX

ajTyG2

jV3.1ajTl

yU

jV3.2ajB.1

jT.1yD ajD.1

jByR

ajBhjBl

yS.1 ajThjV4

yS.2 ajD.2jVs4

yC ajB.2jVf4

jVi4yG1

ajV

jVm4

ajV4.1

fsT jV1ajV4.2

fsB jV3.3ajV4.3

jV3.4ajV1fuDK4

ajV3.1fuDK2

eT

fcV3aoB.1

oV3.1aoB.2

�Vp1oB

aoU.1�Vh3

oV3.3

aoB.3 oV3.4�V4

aoB.4�V1

uV3

�V3

aoW

fdV4

aoV4

wN1aoV3flVx3

aoVm3

pG1fnV4

aoVp3

pG2.1fnV3

aoVo3

pTfnVi3

aoAV3

pB

ffV1

pU

acGq1ffV3

acGh1ffVp4

fV3.1

acV4ffV4

uV3acV3

fmVp3

anG1fuV3

atP

mS.1

atPimC

wP

wWasV2

asS pP

asC pR

pG1.1

pG1.2asU.1

pG1.3

asD.1pGl2.1

asD.2pG2

asTpG2.1

pG2.2asD.4

pG2.3asU.2

pG2.4

asB.1

pT.1

asR

pT.3

asTh

pT.4

asV1

pZ3

pZ3.1asC

pZ3.2

pBlasD.5

pB

asW pB.1

pB.3

pB.5

pB.6

Flin Flon--Athapapuskow0 5 10 15 20 25

km km

Legend

Figure 4: Bedrock geology of the Flin Flon - Athapapuskow Lake region using revised 1:250k legend assignments (resized as in Figure 3)

pBL

pB

pW

pV3

pB

pV pV1pSpW

pCP

pT

pV1

pGlpV3

pV3O

pD

pV3

pV1

pV3V

pD

pV3

pV3O

pV3V

pV3VpV1

pB

pV3V

pV3OpZ1 pV3O

pB

pV3V

pB

pV3V

pV1

pZ1

pV3V

pD

pC

pG

pC

pV3

pV3P

pB

pV3O

pD

pV

pV3P

pV3O

pBL

pV3V

pD

pB

pB

pR

pG

pBpT

pV1P

pV1

pV3V

pV1V

pZ3M

pB

pV3

pV1

pD

pV3O

pT

pT

pV3O

pB

pV3O

pG

pV1pB

pR

pV3P

pT

pB

pV3V

pV3P

pV1V

pV3P

pV2V

pV1

pB

pSpV1pR

pR

pV

pB

pV3 pB

pB pV3

pS

pG

pB

pV3V

pB

pB

pD

pB

pB

pV3O

pV3

pR

pB

pV3V

pV3V

pB

pV3V

pG

pV3P

pV3

pB

pU

pB

pBpG

pBpG

pB

pG

pT

pB

pV3V

pB

pV3P

pT

pUpV

pB

pV3P

pG

pB

pV3OpV3

pT

pV1pV3V

pB

pG

pD

pB pV3pG pB

pB

pT

pV1

pV3O

pV2VpD

pT

pV3O

pV3pB

pB

pB

pT pTpT

pG

pV1P

pB pV

pV3

pV3O

pD

pV3

pV1pV3

pD

pB

pB

pV1V

pT

pV3V

pV3pV3VpV1P

pV1PpBpM

pV3

pTpV3pR

pB

pX

pB

pM

pV1

pV3O

pDt

pD

pG

pVpV3

pV1P

pU

pX

pT

pT

pV1pV3O

pG

pB

pMpV1

pB

pD

pDt

pCP

pW

pV3

pV3V

pB

pV3V

pT

pZ2pW

pV1P

pBL

pCP

pV3

pV3O

pDt

pV3P

pM

pW pV3

pV1pBpV1P

pV3

pU

pW

pV3P

pW

pB

pV3V

pD

pV3P

pT

pW pT

pTpZ3

pB

pS

pV3OpV3O

pT

pBpV3O

pT

pV3P pV3VpB

pV3

pV3O

pV3O

pB

pB

pB

pG

pB

pB pB

pV3

pDt

pW

pA

pU

pZ3

pBpV3V

pB

pB

pG

pB

pV3VpV2

pV3V

pBpT

pN1

pB

pV3O

pB

pV3

pV3

pV3

pUpB pZ3M

pV3pB

pG

pG

pB

pB

pB

pB

pB

pB

pG

pV3

pV3O

pT

pB

pV3P

pV3V

pV3P

pV3V

pM

pG

pV3O

pV3P

pV3V

pV3O

pDpV3V

pV3O

pT

pB

pR

pV1

pS

pT

pB

pT

pV3V

pG

pT

pZ1

pD

pV3O

pV1

pD

pDt

pV3O

pV3

pV3

pV1P

pBpB

pCP

pG

pG

pGN

pCP

pZ2

pV3

pGHpS

pT

pB

pT

pZ3M

pG

pM

pG

pGpB

pG

pT

pB

pV3O

pV3O

pT

pS

pBL

pG

pD

pV1

pV3O

pT

pG

pG

pV3

pV3

pV3O

pM

pM

pG

pV3O

pV3

pG

pN1

pN1

pN1

pG

pG

pG

pV3O

pV3O

pB

pG

pV3

Athapapuskow

Lake

Athapapuskow

Lake

Athapapuskow

Lake

Athapapuskow

Lake

Athapapuskow

Lake

Athapapuskow

Lake

Goose Lake

Swordfish

Lake

ArthursLake

Nesosap Lake

Nesosap Lake

Cliff Lake

Bakers Lake

Leo LakeLi�le

Rat Lake

TimberWolf Lake

Thompson Lake

Sucker Lake

Whitefish

LakeBear Lake

Bryan Lake

Murray Lake

Tapukok

LakePothook LakeSleep Lake

Kinghorn Lake

Milliken Lake

WhiteLake

Niyanun

Lake

Lucile Lake

PersianLake

Nao Lake

Nisto Lake

Ledge

Lake

B. C. Lake

Neso Lake

Blackjack

Lake

TwinLake

Fox Lake

Kelly

LakeDodds Lake

Anvil Lake

Payuk Lake

O�er Lake

BondLake

Lynx

Lake

NewmanLake

Naosap Lake

TartanLake

Aim?e, Lac

Embury Lake

Alberts Lake

Alberts Lake

Mikanagan

Lake

Big IslandLake

Schist Lake

Schist Lake

FirstCranberry

Lake

102°

102°

Flin Flon--Athapapuskow0 5 10 15 20 25

km km

Legend

pS

pW

pC

pCP

pV

pV1

pV1P

pV1V

pV2

pV2V

pV3

pV3O

pV3P

pV3V

pX

pG

pGl

pGH

pGN

pZ2

pZ3

pZ3M

pZ1

pR

pT

pD

pDt

pB

pBL

pU

pA

pM

pN1

Sedimentary Rocks

Quartzo-feldspathic sandstone

Argillaceous sandstone to mudstone (e.g. turbidites)

Conglomerate

polymic�c

Volcanic Rocks & Derived Sediments

Undifferen�ated volcanic rocks

Felsic volcanic rocks

porphyri�c

volcaniclas�c

Intermediate volcanic rocks

volcaniclas�c

Mafic volcanic rocks

pillow basalt

porphyri�c basalt

volcaniclas�c

Intrusive Rocks

Pegma�te

Granite to granodiorite

leucocra�c

xenolith-bearing

gneissic

Syenite

Monzodiorite to quartz monzodiorite

monzodiorite to quartz monzonite

Monzonite

Felsic porphyri�c rocks (e.g. hypabyssal)

Granodiorite to tonalite

Diorite, quartz diorite

diorite to tonalite

Gabbro, diabase, diorite, norite

composi�onally layered

Ultramafic rocks

Metamorphic Rocks

Amphibolite

Mylonite, tectonite, cataclasite

Felsic gneiss

Proterozoic

pAAmphibolite

g) garnet amphibolite

h) amphibolite, diopside- &/or hornblende-bearing

O) amphibolite with locally preserved pillowstructures

pBGabbro, diabase, diroite, norite

L) composi�onally layered gabbro

pCMetaconglomerate

h) hornblende bearing polymic�cmetaconglomerate

N) gneissic metaconglomerate

pDDiorite, quartz diorite

m) magne�te quartz diorite

N) gneissic quartz diorite to granodiorite

t) diorite to tonalite

x) pyroxene diorite

pEEnderbite

x) gneissic ferrohypersthene enderbite

pFIron forma�on

o) oxide facies iron forma�on

s) silicate facies iron forma�on

pG1Granite

b) bio�te granite to grani�c gneiss

f) granite, fluorite bearing

g) garne�ferous granite to granodiorite

H) hybrid granite

h) hornblende granite, aplite

l) leucocra�c granite

m) magne�te granite, petma�te

N) gneissic granite to granodiorite, grani�cgneiss

P) porphyri�c and megacrys�c granite,leucogranite

R) seriate to prophyri�c granite

X) pegam��c granite

pG2Granodiorite, granite, tonalite

b) bio�te granodiorite

H) hybrid granodiorite to granite gneiss

h) hornblende granodiorite

l) leucocra�c granodiorite

N) gneissic granodiorite to tonalite

P) porphyri�c and megacrys�c granodiorite totonalite

v) muscovite bearing granodiorite - granite

pIAnorthosi�c gabbro, anorthosite

pKCalc-silicate rock, marble, dolomi�cmarble

x) albite-pyroxene rock ± marble

pMMylonite, myloni�c granitoid gneiss

pN1Felsic gneiss, migma�te

H) hybrid gneiss

h) hornblende-bearing quartzofeldspathicgneiss

m) magne�te-bearing felsic orthogneiss

N) semipeli�c paragneiss to metatexite withtonalite

pN2Intermediate gneiss

pPPhyllonite, mylonite, tectonite, cataclasite,schist

m) mudstone, subordinate arenite

pQQuartzite

pRQuartz- to feldspar-porphyry

pSArenites: sandstone, siltstone, arkose,quartzofeldspathic paragneiss

b) bio�te gneiss, meta-arkose

h) hornblende bearing quartzofeldspathicgneiss

m) magne�ferous quartzofeldspathic gneiss

M) quartzofeldspathic migma�te andmigma��c gneiss

N) arkosic gneiss

q) quartz arenite

pTTonalite to quartz diorite, granodiorite

A) augen tonalite

b) bio�te tonalite

f) tonalite to granodiorite, fluorite-bearing

H) hybrid tonalite, tonali�c gneiss

h) hornblende tonalite

l) leucotonalite, leucocra�c gneissic tonalite

m) magne�te tonalite to granodiorite

N) gneissic to foliated tonalite to granodiorite

g) gneissic garne�ferous tonalite-granodiorite

P) megacrys�c bio�te tonalite to granodiorite±garnet

x) clinopyroxene tonalite

pUUltramafic rocks

pVUndifferen�ated volcanic rocks

pV1Rhyolite, dacite, pyroclas�c rocks

pV2Intermediate volcanic rocks

P) porphyri�c and aphyric basalt andandesite

pV3Pillowed to massive mafic volcanic rocks

k) basalt and koma�i�c basalt

O) pillow basalt

P) porphyri�c basalt

pV4Volcanicals�c rocks

f) felsic volcaniclas�c rocks

i) intermediate volcaniclas�c rocks

m) mafic volcaniclas�c rocks

pWGreywacke and derived gneiss, migma�te

b) bio�te bearing greywacke and gneiss

f) potassium feldspar bearing greywackeand gneiss

g) garne�ferous gneiss, metagreywacke

h) hornblende bearing greywacke-derivedgneiss

m) magne�te bearing greywacke-derivedmigma�te

q) quartzofeldspathic greywacke, bio�teparagneiss

t) staurolite metagreywacke, schist

V) volcaniclas�c greywacke

pXPegma�te, pegma��c granite

pZ1Monzonite, monzogranite

h) hornblende bearing monzonite to quartzmonzonite

P) megacrys�c monzonite to monzogranite

pZ2Syenogranite, syenite

pZ3Monzodiorite to quartz monzonite

Proterozoic and/or Archean

uAAmphibolite

uBGabbroic and mafic dykes (MolsonSwarm)

uCConglomerate, volcanic derived (probablyArchean)

uG1Granite, leucogranite

N) foliated granite, leucogranite

uG2Granodiori�c gneiss to diatexite

N) foliated granodiori�c gneiss

uNFelsic to tonali�c gneiss

A) augen gneiss

b) bio�te ± hornblende gneiss

L) layered migma�te gneiss, migma�te

uSMetasedimentary rocks

uTTonalite, tonali�c gneiss

uUUltramafic rocks, largely serpen�nizedperido�te

uV3Mafic to ultramafic metavolcanic rocks

Archean

aAAmphobolite, layered amphibolite

d) garnet-diopside amphibolite

f) amphibolite to gabbro, plagioclaseporphyri�c

g) amphibolite, garnet bearing, locallylayered

L) layered amphibolite, metagabbro, gneiss

x) pyroxene amphibolite

aBGabbro, layered metagabbro, diabasedykes

a) anorthosi�c gabbro

f) plagioclase-phyric gabbro (agma�te)

h) hornblende gabbro

P) porphyri�c gabbro, diabase

x) pyroxene-phyric gabbro

aCMetaconglomerate, polymic�cconglomerate

V) volcanic conglomerate

X) conglomerate with pegma��c granite andpegma�te

aDDiorite, quartz diorite, tonalite

h) diorite, quartz diorite, bio�te+hornblende-bearing

q) quartz diorite

aEEnderbite, enderbi�c gneiss

N) enderbi�c gneiss

g) enderbi�c gneiss, garnet bearing

S) schollen enderbite

aG1Granite, leucocra�c granite, quartzmonzonite

A) augen granite

b) bio�te granite to granodiorite

h) hornblende-bio�te granite

H) xenolith bearing granite, granodiorite

k) microcline granite

l) leucogranite

N) gneissic granite to granodiorite gneiss

P) porphyri�c and porphyroblas�c granite

X) pegma��c granite, pegma�te

aG2Granodiorite, tonalite, quartz diorite

A) augen granodiorite; felsic augen gneiss

b) bio�te granodiorite

H) hybrid granodiorite to grani�c gneiss

h) hornblende-bearing granodiorite

l) leucogranodiorite

N) gneissic granodiorite to gneissic tonalite,locally migma��c

P) porphyri�c, porphyroblas�c, andmegacrys�c granodiorite

x) pyroxene granodiorite, gabbro

X) pegma�te

aHChloritoid schist

aIAnorthosite, anorthosi�c gabbro

aMMigma�te: mixture of granodiorite gneissto tonalite gneiss, granite, tonalite

aN1Grani�c and granodiori�c gneiss,migma�te

D) laminated felsic gneiss

g) garne�ferous quartzofeldspathic gneiss

X) felsic gneiss with abundant pegma�te andaplite

aN2Intermediate layered to migma��c gneiss

M) migma��c paragneiss

h) hornblende gneiss

m) mesocra�c to melanocra�c layered gneiss

aN3Mafic gneiss, in part migma��c

N) migma�te, hornblende and hornblende-bio�te gneiss

aO1Felsic to intermediate granulite, opdalite,enderbi�c gneiss

P) porphyri�c opdalite

aO2Mafic granulite

aPMetamorphosed shale and silty shale

p) pyri�ferous siltstone and shale

aQQuartzite

aRFelsic porphyry

f) plagioclase porphyry

q) quartz porphyry

aSArenites: quartz-plagioclase paragneiss,sandstone, bio�te gneiss, arkose

q) quartz arenite, minor mudstone,conglomerate

x) bio�te gneiss with pyroxene

aTTonalite to granodiorite, with tonali�c togranodiori�c gneiss

A) augen tonalite

b) bio�te tonalite

g) tonali�c granofels

H) hybrid tonalite, tonali�c gneiss

h) hornblende tonalite

L) tonalite to tonali�c gneiss, layered

l) leucotonalite

N) geneissic tonalite to tonali�c gneiss

P) porphyri�c tonalite

x) hypersthene tonalite

Y) myloni�c tonalite

aUUltramafic rocks

k) koma�ite, koma�i�c basalt

s) ultramafic to mafic rocks, sapphirinebearing

aV1Felsic volcanic rocks

F) volcanic fragmental rocks, relatedsediments

P) porphyri�c rhyolite

Y) myloni�c volcanic rocks

aV2Intermediate volcanic rocks

aV3Mafic volcanic Rocks

F) mafic volcanic fragmental rocks, relatedsediments

O) pillowed basalt

P) mafic plagioclase-phyric flows

aV4Volcaniclas�c rocks and relatedsedimentary rocks

f) felsic volcaniclas�c rocks

i) intermediate volcaniclas�c rocks

aWMetagreywacke

N) amphibolite-bio�te-garnet gneiss

T) tuffacious greywacke

aXPegma�te, aplite

aZ1Quartz monzonite

x) hypersthene granite (monzocharnockite)

H) hypersthene granite and hybrid granite,gneiss

aZ2Syenite

aZ3Monzodiorite

x) monzodiorite, pyroxene-bearing

Figure 1: Previous 1:250k scale bedrock geology legend

pS

pSb

pSh

pSm

pSq

pW

pC

pCM

pCP

pF

pFo

pFs

pK

pKx

pP

pV

pV1

pV1P

pV1V

pV2

pV2V

pV3

pV3b

pV3O

pV3P

pV3V

pX

pXg

pXm

pG

pGb

pGf

pGg

pGh

pGl

pGo

pGH

pGN

pGP

pGX

pZ2

pZ2q

pZ3

pZ3x

pZ3M

pZ1

pZ1h

pR

pT

pTf

pTl

pTo

pTH

pD

pDg

pDm

pDt

pDx

pB

pBK

pBL

pBM

pBP

pI

pU

pY

pA

pAL

pM

pN1

pN2

pN3

uC

uW

uV

uV1

uV2

uV2O

uV3

uG

uGl

uGN

uT

uB

uU

uY

uA

uN

aS

aSb

aSh

aSm

aSq

aW

aC

aCM

aCP

aF

aFo

aFs

aK

aP

aV

aV1

aV1P

aV1V

aV2

aV2V

aV3

aV3b

aV3k

aV3O

aV3P

aV3V

aX

aXg

aXm

aG

aGb

aGf

aGg

aGh

aGl

aGo

aGH

aGN

aGP

aGX

aZ2

aZ2q

aZ3

aZ3x

aZ3M

aZ1

aZ1h

aR

aT

aTf

aTl

aTo

aTH

aTN

aD

aDg

aDm

aDt

aDx

aB

aBL

aBP

aI

aU

aY

aA

aAL

aM

aN1

aN2

aN3

Proterozoic

Sedimentary Rocks

Quartzo-feldspathic sandstone

bio�te-bearing

hornblende-bearing

magne�te-bearing

quartz sandstone

Argillaceous sandstone tomudstone (e.g. turbidites)

Conglomerate

monomic�c

polymic�c

Iron forma�on

oxide facies

silicate facies

Calc-silicate rock, marble,dolomi�c marble

albite-pyroxene rock +/-marble

Mudstone

Volcanic Rocks & Derived Sediments

Undifferen�ated volcanic rocks

Felsic volcanic rocks

porphyri�c

volcaniclas�c

Intermediate volcanic rocks

volcaniclas�c

Mafic volcanic rocks

basalt and koma�i�cbasalt

pillow basalt

porphyri�c basalt

volcaniclas�c

Intrusive Rocks

Pegma�te

grani�c

mafic

Granite to granodiorite

bio�te-bearing

fluorite-bearing

garnet-bearing

hornblende-bearing

leucocra�c

orthopyroxene-bearing(charnockite to opdalite)

xenolith-bearing

gneissic

seriate or porphyri�c

pegma��c

Syenite

quartz syenite

Monzodiorite to quartzmonzodiorite

pyroxene-bearingmonzodiorite

monzodiorite to quartzmonzonite

Monzonite

hornblende monzoniteto quartz monzonite

Felsic porphyri�c rocks (e.g.hypabyssal)

Granodiorite to tonalite

fluorite-bearing

leucocra�c

orthopyroxene-bearingtonalite (enderbite)

xenolith-bearing

Diorite, quartz diorite

(quartz) diorite togranodiorite

magne�te-bearing

diorite to tonalite

pyroxene-bearing

Gabbro, diabase, diorite, norite

mafic dikes (MacKenzie)

composi�onally layered

mafic to ultramafic dikes(dominantly Molson)

porphyri�c

Anorthosi�c gabbro,anorthosite

Ultramafic rocks

Metamorphic Rocks

Metasedimentary rocks

Amphibolite

layered amphibolite

Mylonite, tectonite, cataclas�te

Felsic gneiss

Intermediate gneiss

Mafic gneiss

Proterozoic / Archean

Sedimentary Rocks

Conglomerate

Argillaceous sandstone tomudstone

Volcanic Rocks & Derived Sediments

Undifferen�ated volcanic rocks

Felsic volcanic rocks

Andesite, interlayered tuff,minor basalt

pillowed andesite

Mafic to ultramafic volcanicrocks

Intrusive Rocks

Granite to granodiorite

leucocra�c

gneissic

Granodiorite to tonalite

Gabbro, diabase, diroite, norite

Ultramafic rocks

Metamorphic Rocks

Metasedimentary rocks

Amphibolite

Felsic gneiss

Archean

Sedimentary Rocks

Quartzo-feldspathic sandstone

bio�te-bearing

hornblende-bearing

magne�te-bearing

quartz sandstone

Argillaceous sandstone tomudstone (e.g. turbidites)

Conglomerate

monomic�c

polymic�c

Iron forma�on

oxide facies

silicate facies

Calc-silicate rock, marble,dolomi�c marble

Mudstone

Volcanic Rocks & Derived Sediments

Undifferen�ated volcanic rocks

Felsic volcanic rocks

porphyri�c

volcaniclas�c

Intermediate volcanic rocks

volcaniclas�c

Mafic volcanic rocks

basalt and koma�i�cbasalt

koma�ite and koma�i�cbasalt

pillow basalt

porphyri�c basalt

volcaniclas�c

Intrusive Rocks

Pegma�te

grani�c

mafic

Granite to granodiorite

bio�te-bearing

fluorite-bearing

garnet-bearing

hornblende-bearing

leucocra�c

orthopyroxene-bearinggranodiorite

xenolith-bearing

gneissic

seriate or porphyri�c

pegma��c

Syenite

quartz syenite

Monzodiorite to quartzmonzodiorite

pyroxene-bearingmonzodiorite

monzodiorite to quartzmonzonite

Monzonite

hornblende-bearingmonzonite to quartzmonzonite

Felsic porphyri�c rocks (e.g.hypabyssal)

Granodiorite to tonalite

fluorite-bearing

leucocra�c

orthopyroxene-bearingtonalite (enderbite)

xenolith-bearing

gneissic

Diorite, quartz diorite

(quartz) diorite togranodiorite

magne�te-bearing

diorite to tonalite

pyroxene-bearing

Gabbro, diabase, diorite, norite

composi�onally layered

porphyri�c

Anorthosi�c gabbro,anorthosite

Ultramafic rocks

Metamorphic Rocks

Metasedimentary rocks

Amphibolite

layered amphibolite

Mylonite, tectonite, cataclasite

Felsic gneiss

Intermediate gneiss

Mafic gneiss

Figure 2: Revised 1:250k scale bedrock geology legend (draft)

L. Chackowsky, T. Martins, M. Rinne, C. Couëslan and C. BöhmManitoba Geological Survey

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